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Research on the thermal history of the moonLunar thermal history modelling is used to demonstrate that a realistic computer simulation can be used to predict major and minor element concentrations, thickness of the lunar crust, and intensity of volcanic activity as a function of time. The models which are most consistent with the observations include: (1) a high surface temperature and low interior temperature during the very early lunar history; (2) high near-surface radioactivity and relatively low radioactivity in the interior; and (3) a molten zone formed at or near the surface which gradually migrates downward with time. Lunar magnetic anomaly calculations show that large anomalies measured at some of the landing sites and above some points on the surface cannot be caused by mere basalts but are consistent with valley fillings of Cayley-like material with a remanent magnetization of about 0.0002 emu/gm.
Document ID
19740027128
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Date Acquired
September 3, 2013
Publication Date
July 1, 1974
Subject Category
Space Sciences
Report/Patent Number
NASA-CR-140257
Accession Number
74N35241
Funding Number(s)
CONTRACT_GRANT: NAS9-11968
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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